A polyvalent hard white metal, ruthenium is a member of the platinum group. Like the other metals of the platinum group, ruthenium is inert to most chemicals. Most ruthenium is used for wear-resistant electrical contacts and the production of thick-film resistors. A minor application of ruthenium is its use in some platinum alloys.[Wikipedia]

This compound belongs to the class of chemical entities known as homogeneous transition metal compounds. These are inorganic compounds containing only metal atoms,with the largest atom being a transition metal atom.